Three words, when that is all you have
The closing supplication of Sūrat al-Mu'minūn.
وَقُل رَّبِّ ٱغْفِرْ وَٱرْحَمْ وَأَنتَ خَيْرُ ٱلرَّٰحِمِينَ
Rabbi-ghfir wa-rḥam wa anta khayru-r-rāḥimīn.
And, [O Muḥammad], say, "My Lord, forgive and have mercy, and You are the best of the merciful."
Source
The Qur'an · 23:118
Qur'an
- Qur'anic text in the Uthmani script via Quran.com; translation: Saheeh International